$(function(){
	var top = $("#top") ;
	var left_sidebar = $("#left_sidebar") ;
	var sidebar_header = $("#left_sidebar .sidebar_header") ;
	var sidebar_menu = $("#left_sidebar .sidebar_menu") ;
	var main_container = $("#main_container") ;


	sidebar_menu.css({
		"height": sidebar_menu.height()-(top.height()+sidebar_header.height())
	});
	main_container.css({
		"width": main_container.width()-left_sidebar.width(),
		"height": main_container.height()-top.height()+"px"
	});
});